<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{
	padding: 0;
	margin: 0;
}
#top{
	margin: 0 auto;
	display: block;
	margin-top: -300px;
}
	
</style>
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript">
	
$(function(){
//	让广告的animate到0
	$("#top").animate({'margin-top':0},2000,function(){
//			可以用delay对后面的运动进行延迟操作
			$("#top").delay(3000).animate({'margin-top':-300},1000)


	})
})




</script>
</head>

<body>

<img src="top.jpg" id="top" />
<img src="bbs3.jpg"/>

</body>
</html>
